Electric incandescent lamp.



m. 886,821. PATENTED MAY 5,- 1908. H. KDZEL. ELECTRIC INGANDESGBNT LAMP.

PPPPPPPPPPPPP min JULY 16. 1907.v

2 sums-sum 1. I

WITNESSES lNVENTOR ATTORNEYS No 886,821, PATENTED MAY 5, 1908.

H. KUZBL.

ELECTRIC INGANDBSOENT LAMP. APPLICATION FILED JULY 16; 1907.

2 SHEETS SHEET 2 WITNESSES ATTOKNEYS and. useful,Electriclncai descentLamp I. lm s KuzEnor rADEN, NEARVIENNA; AUSTBiAHUN-GA -RY.

megawatt;- n that I,' HANS KUZEL, 'a' sjube eat; E dent-of B aden,'nearYienna, Empire of Ans 'trla-Hungary, have inventeda certain new ,of

horseshoe connected to the leading-in Wires." 'lllleioliject of myinventionis to construct theffiiaments and soIsup ort them in theirbulbs to preventgl ab thefilan entsannse and to prevent also suchdeformations of the loops of the filaments when;burning asto'eause shortcircuits.

- The. abi etl a a y m u and h0ld ing or sup orting the horseshoefilaments loosely .a-limited freedom in a bent,or twisted state in whichtheir free movement is beforehand impededfiQ, 8 Certaifi g e y tion,'forinstance in the horihontal or the vertheir position andliriction inthe holding devices. For this purpose they are supported from a central.support or the wall of the bulb by hooks, eyelets, or mere small rodswhich are so arranged that an'imaginary line con necting the successivebearing oints of each through the longitudinal axls of the lamp filamentleg is inclined to anes, passing 7 and by preference helically or similay wound. f In the accom anying drawings'Figure 1 is a side view of a ampcontaining filaments in accordance with my invention; Fig. 2 is aperspective view of filaments with modified arrangement of holdingmeans; Figs. 3 and 4 the hol are illustrations of modifications.

In Fi 1 the simplest case is assumed that 'ng devices a, b, c, forhorseshoe filaments arecarried by a central support d and the filamentsare arranged on an lmaginar cylindrical surface withtheir legs inapproxlmately regular helical lines.

The two le' s of each filament run approximately p ra el the one to theother, and owing tot e elasticity inherent in them, they are in contactwith their holding devices whereby their free movement is impeded.

, On burning the lamp in any desired oblique or upright position it willbe seen that the curvatures and distortions due to the impeded freemovement of the legs of the filannncraic'mcaunnscnnr i specificationofLett rsPatent Application fl1ed"J'u1y"16,"1 9 (l7. Seria1No.383,9l55.-

Qty to breakage of' shoe filaments arranged to describe a .cyhnder.about the axis of the-lam they may be arranged in the. barrel-like 017mshown in 'Fig. 2, Again, instead of guiding and sup porting the loops ofthe; horseshoe filaments cm a central support, they may be guided andsupported from the-wall of the glass bulb, asby hooks or supportcarrying guide eyes arts 0f hehorseshoes near their sealed into the wallof the bulb. I, After burning a lamp of the construction ments arealways suchthat contact between ad acent Cparts of thefilaments ispractically meat-Gamay 5, 1908.1 l

'de-ey'es b,'c, sealed into the wall of the bu b, as shown in Fig. 3. Or.there maybe a combination offthe'two' ways of supporting thefilaments,as indicated for exam 'le in Fig. 4', where there isshown a centra c forthe bends, w 'e the intermediate eyes are described,'for,a short time,in a giyen posi;-,-.

tical or in any desired inclined position the various parts of thefilaments assume be-' tween any two supporting points, (as to which thesoldering or cementing beads have to be considered) under the action ofgravity upon the metal softened by the heat, the form of downwardlydirected arcs. owing to cooling down on throwing the lamp out of circuita contraction of the filament takes lace, such arcswill compensate forthe same vent the eaking of the filaments. This way of supporting,therefore, on burning the lamp, causes the filaments to assume suchein'g flattened and thereby will pie-'- If now posltions thatsimultaneously both of the inconveniences above referred to (breakingof.

the filaments and short circuiting of the same), are practicallyavoided, so that the lamps when burned in any desired position showanormal len th of life.- This is a result of the inclining o the legs ofthe horseshoe filaments to planes passing through the longitudinal axisof the lamp, so that the yokeshaped filaments can never hang perfectly,but so that they bear at all times on one oint of each holding devicewhatever may be the position of the lamp. In this way a moderatefrictional resistance will result from the weight of the filaments,which prevents the legs. of the filaments from moving freely on throwingthe lamp intocircuit, but owing to the dilatation due toheating thefilaments to incandescence, arcs or beads in the filaments are produced'Gravity tends to make the legs of the filaments parallel, and thuscounteracts any ten d ency to come, into contact with each other in thearrangement set forth. Further, it

causes the formation of. arc-shaped parts in.

the filaments which act to compensate and Compared devices within thebulb 0 the lam 'de each of said legs ongitudiprevent the filaments" frombreaking on throwing the lamp out of circuit again.

The spiral arrangement of the filament also filament leg being inclined;to planes passing "through he longitudinal axis of the lamp and thecenters of such holding'devices substantially as and for the purposedescribed.

2. In an electric incandescent lamp, the combination of a horseshoeshaped metal filament having theiree ends of its legs fastened toleading-in-wires and a plurality of holding to loosely nally at a purality of points, the line connectas and for the purpose longitudinallywith lamps having stretched fila-' adapted,

mg the centers of successive holding devices of each legbeing a helicalline, substantially 1 described. 3. In an electric incandescent lamp,the

ment having the free ends of its legs fastened to leading-in wires; acentral support within the bulb of the lamp and a and adapted to looselyguide each of said eggs at a plurality of points, the lines connectingsuccessive holding devices of each filament leg being inclined to theplanes assing through the longitudinal axis of the amp and the centersof such holding devices substantially as and for the purpose described.v

4. In an electric incandescent lamp, the combination. of a horseshoeshaped metal filament having the free ends of its legs fastened toleading=in wires, a central support within the bulb of the lamp anda1plurality of bold:

ing devices attached to sue centralsup ort and adapted to loosely guideeach of saidq longitudinally at a plurality of points, the lineconnecting the centers of successive holding devices ofeach leg being ahelical line, substantiallyas and for the purp'osedescribed. I t v p Intestimony w ereof. I have signed my name to, this specification, in thepresence of two subscribing witnesses. v HANS KUZEL. Witnesses: v

'JOHN GEORGE HARDY; Ron'rl W. HEINGABTNER.

egs

.40 combination of a horeshoe shaped metal fila I lurahty of holdingdevices attached to sue central support

